Why did the the war in the pacific breakout?
You mean WWII? Because if that's watcha mean it broke out because JAPAN attacked Pearl Harbor, Hawaii & this triggered U.S. to join the war. Go on Wikipedia.org it has the entire story under Pearl Harbor attack.(:
In what ways did naval power play a different role in the Pacific war than it did in the war in Europe?
Pacific war. Pearl Harbor is in Hawaii and Hawaii is in the Pacific. The men who were in the Pacific war had to take back each island from the Japanese and the Philippines. In Manila there was hand to hand fighting. There is a film series called Victory at Sea that has real footage of the Pacific war.